RU1787523C - Method of producing carbon adsorbent - Google Patents

Abstract

SUMMARY OF THE INVENTION: A waste from the production of acetylene from methane - an aqueous suspension of carbon black and linear polymers is treated at 20-100 ° C; C to a loose state with a moisture content of not more than 40%. The powder is granulated and carbonized. 2 tab.

Description

The invention relates to the field of the production of mechanically strong carbon sorbents used as catalyst supports and for the separation of gases and liquids.

. The aim of the invention is to increase the crush strength of the sorbent. Example 1. A waste from the production of acetylene from methane: a 13.6% aqueous suspension of carbon black and linear polymers is dried at 100 ° C for 1 hour until 86.4% weight loss. A free-flowing powder is obtained / containing carbon black and 6.1% acetone-soluble linear polymers in which there is practically no water.

The powder is tabletted at a pressure of 750 kgf / cm2. Get granules with a total porosity of 0.45 ml / g and crushing strength of 113. kgf / cm (table. 1). The granules are carbonized by heat treatment in a stream of nitrogen npt. 700 ° C for 1 hour

The characteristics of the obtained carbon sorbent are presented in table .. 2.

Examples 2-: 4. Similar to the example with the exception of temperature and duration of the day, the values of which are presented in Table. 1.,. ...

EXAMPLE 5. The process is carried out as in Example 1, but the aqueous suspension of carbon black and linear polymers is dried to a weight loss of 83.5%. Get a loose powder of carbon black and linear polymers with a water content of 21.5%. The powder is tabletted at 750 kgf / cm. The obtained granules with a total porosity of 0.42 ml / g and crushing strength of 117 kgf / cm2 are subjected to carbonization by heat treatment at 700 ° C for 1 h. The characteristics of the obtained carbon sorbent are given in Table 2.

EXAMPLE 6 The process is carried out in Example 1, but the aqueous suspension of carbon black of linear polymers is dried to a mass loss of 81.0%. Get a loose powder of carbon black and linear polymers with a content of 40.0%. The powder is tabletted at 750 kgf / cm2. The obtained granules with a total porosity of 0.35 ml / g and crush strength. Nye 114 kgf / cm2 is subjected to carbonization by heat treatment in a stream of nitrogen at 700 ° C for 1 h. The characteristics of the obtained sorbent are given in table. 2.

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Example 7. A 13.6% aqueous suspension of carbon black and lignin GC polymers was dried at 110 ° C for 0.75 hours. Mass losses were 87.3%. A free flowing powder was obtained containing a significant amount of red-brown inclusions. The powder is tabletted under a pressure of 750 kgf / cm2. Granules are obtained with a total porosity of O, ZG ml / g and a discharge strength of 98 kgf / cm2. The granules are subjected to carbonization by heat treatment in a stream of nitrogen at 700 ° C for 1 h. The characteristics of the obtained carbon sorbent are presented in table. 2.

Thus, the use of waste from the production of acetylene from methane can increase the strength of carbon sorben

5

that 1.5-2 times. In addition, waste disposal will significantly increase the economic efficiency of acetylene production.

SUMMARY OF THE INVENTION A method for producing a carbon sorbent, comprising treating a carbon-containing raw material based on soot and a polymer binder, granulating it and carbonizing granules, characterized in that, in order to increase the crush strength of the sorbent, carbon-containing raw materials are used waste from the production of acetylene from methane in the form of an aqueous suspension of soot and linear polymers, and the treatment is carried out by drying at 20-100 ° C to a granular state of the raw material with a moisture content of not more than 40%.

 Drying is carried out under vacuum.

Table 1

Table 2